Final answer:
To solve the equation for s, multiply both sides of the equation by 360 and then divide by πr² to isolate s.
Step-by-step explanation:
To solve the equation for s, we need to isolate s on one side. To do this, we can start by multiplying both sides of the equation by 360 to get rid of the denominator:
360A = πr²s
Next, we can divide both sides of the equation by πr² to solve for s:
s = 360A/(πr²)
Therefore, the value of s in the formula is s = 360A/(πr²) (option a).